What .410 ammo to buy and where?

I haven't shot in probably 3 years, but I met some old friends and they want to get together for some skeet shooting. I've got a .410 shotgun and no ammo. Any advice on which ammo to buy and where to get it from? I'm on a tight budget here so I'm looking for the best bang for the buck. There are no gun stores in my area and the only place to buy ammo is walmart so unless someone has something good to say about walmart I will most likely be ordering online.

If the gun shoots 3 inch, and if the club allows it start there. Generally, you can't shoot any larger than 7 1/2 shot. 7 1/2, 8, or 9 shot at (11 /16 ounce) should be acceptable. You first should find out what the club allows and as always you will have to find what the gun prefers.

FWIW- unless you shoot at aerial targets a LOT with a .410, prepare to become a humble man!

I inherited a Remington 1100 Light field in .410. LOVELY little shotgun. I consider self to be a fair wing shot- grew up popping quail, doves, and the occasional lost pheasant- with 12 16, and 20 guage guns.

Friends invited me to go shoot a few rounds of Sporting Clays with them. In memory of Dad, brought the .410. 50 shells later, having broken 20 of the clays........

The .410 is truly an EXPERT'S shotgun- the shot string is just REALLY small.